Home / 22,981.54-31,712-12,907.66

Finding the Fourth Proportional to 22,981.54, 31,712 and 12,907.66

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Solution

The fourth proportional to 22,981.54, 31,712 and 12,907.66 is: 17,811.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,981.54 : 31,712 = 12,907.66 : x
  2. Step 2: Convert to fraction form
    22,981.54/31,712 = 12,907.66/x
  3. Step 3: Cross multiply
    22,981.54x = 31,712 × 12,907.66
  4. Step 4: Simplify right side
    22,981.54x = 409,327,713.92
  5. Step 5: Solve for x
    x = 409,327,713.92/22,981.54
  6. Step 6: Final answer
    x = 17,811.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.